The 11th ORSN International Conference (ORSN 2020) was held in Pokhara (Nepal) on February 1-2, 2020 with theme of Operations Research: Sustainable Development on the occasion of 13th annual day of ORSN. The ORSN Conference was organized by Janapriya Multiple Campus, a Quality Assurance and Accreditation (QAA )certified community College. The Conference brought 121 participants from four different countries (Nepal, India, China and Japan) and 68 papers in total. The chief guest of the conference was Prof. Dr. Giridhari Sharma Paudel, Vice Chairman of Provincial Policy and Planning Commission, Gandaki Province. He discussed the resolution drawn from the conference and its implementation in the policy of the government. Prof. Dr. Sunity Shrestha Hada (the immediate past president of ORSN) highlighted the conference theme and its procedures. The program was conducted by Bijay Lal Pradhan.